Please press with a slender object such as needle into the hole to force a shut down, when the system is not booting or has a power failure, which cannot be fixed by pressing and holding the power button for 10 seconds.

Location of the force shutdown switch (hole):

Satellite and Satellite Pro L50-A/L50D-A/L50T-A/P50-A/P50T-A/S50-A/S50D-A/S50DT-A/S50T-A

Satellite L50T-A/L50DT-A

Satellite L40-A/L40T-A/P40-A/P40T-A

Reference picture of real hole and switch